Iterator::any

Iterator::any 是一个函数，当传递一个迭代器时，如果任何元素满足谓词，它将返回 true。否则返回 false。它的签名是

pub trait Iterator {
    // The type being iterated over.
    type Item;

    // `any` takes `&mut self` meaning the caller may be borrowed
    // and modified, but not consumed.
    fn any<F>(&mut self, f: F) -> bool where
        // `FnMut` meaning any captured variable may at most be
        // modified, not consumed. `Self::Item` states it takes
        // arguments to the closure by value.
        F: FnMut(Self::Item) -> bool;
}

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另请参阅

std::iter::Iterator::any